Rotary engine or pump



2 Sheets-Sheet 1. S. BARROW, D. BARROW 85 J. BARROW.

Rotary E'ngine or Pump.

Patented Aug. 24, 1880.

WITNESSES INVENTOR ATTORNEYS.

N. PEIERS PHOTO LTHDGRAPHER WASHINGTON D C 2 Sheets-Sheet 2. S. BARROW,D. BARROW-& J. BARROW.

Rotary Engine 0 r Pump.

Patented Aug. 24,1880.

E L 1.11.1 lIlIIIIIHl INVENTOR WITNESSES W M BY y I 46) ATTQRNEYS.

N. PETERS, Puo'io LTHOGRAPNER UNITEfi STATES PATENT OFFICE.

SAMUEL BABROW, DAVID BARROW, AND JACOB BARROW, OF INDIAN- APOLIS,INDIANA.

ROTARY ENGINE OR PUMP.

- SPECIFICATION forming part of Letters Patent No. 231,520, dated August24, 1880.

Application filed February 11, 1880.

To all whom tt may concern:

Be it known that we, SAMUEL BARROW, DA- VID Bnnnow, and J AOOB BARROW,of Indianapolis, in the county of Marion and State of Indiana, haveinvented a new and useful Improvement in Rotary Engines and Pumps, ofwhich the following is a specification.

Our invention relates to rotary engines water-motors, or pumps whereinawheel is fitted eccentrically in an elliptically-sh aped chamber orsteam and water way, and fitted with two pistons, which are projectedfrom the periph' cry of the wheel and travel in an elliptical path.

Our invention consists in certain novel details of construction of theengine, which will be particularly described hereinafter with referenceto the accompanying drawings, forming part of this specification.

In the drawings, Figure l is a side elevation of the engine. Fig. 2 is avertical section on line a." w of Fig. 1. Fig. 3 is a vertical sectionat right angles to the axis of the wheel on line 3 3 of Fig. 2. Fig. 4is a side View of the wheel. Fig. 5 is a View of the wheel at thereverse side and partially in section. Figs. 6, 7, and 8 are diagramsillustrating the elliptical movement of the pistons. Figs. 9 and 10 aredetail views.

Similar letters of reference indicate corresponding parts.

A is the case of the engine, formed with an elliptical interior, a, andfitted with side plates, b a, between which is the wheel B, hungeccentrioally to the interior a. The wheel B is sustained at one side bya hollow trunnion or axle, d, that extends through the plate to thespider c that is attached upon the plate 0, and at the opposite side bythe shaft 6, that is connected to the wheel and extends through plate I)and through a box in the spider f. The shaft 6 is formed at its outerend with a coupling for taking power from the engine, or for driving thewheel B by a separate motor when the apparatus is used as a pump.

Upon the axle d and shaft e are packing glands or rings g, which enterstuffing-boxes formed in plates 1) 0, andscrews g, tapped in the spidersc and f, serve to press the rings 9 upon the packing and pack the axleand shaft tightly. The side plates of wheelB are grooved to receivemetal packing-segments h, which are pressed outward against theplates 1) c by spiral springs i, placed in mortises behind the segmentsh, as shown in the detail, Fig. 9. This construction furnishes completeand durable packing.

At the upper part of interior athe case A is fitted with a metalpacking-segment, k, that is pressed down on wheel B by a spiral spring,Z, as shown in Fig. 2. At opposite sides of packing 7c are ports m m,connecting with grooves 11. n in the sides of interior a, and be tweenthe ports at m is an exhaust-port, 0, communicating with theexhaust-pipe p.

The wheel B consists of a ring portion, 1, (shown most clearly in Figs.4 and 5,) that is formed with radial mortises, which serve as boxes orslideways for the pistons s, and the sides of the ring 4" are covered byring-plates t, which inclose the operating mechanism of the pistons, andare slotted, so that the pistons may project in contact with the sideplates, b c, of the case. The pistons s are fixed on the outer ends ofarms a, that project from a central cross-head, o, the arms being packedwhere they pass through the ring 1", (see Figs. 2 and 5,) and in thesides of pistons 8 there are fitted metal packings s, which are forcedoutward in contact with plates 1) c by spiral springs s.

The cross-head c is slotted and contains a sliding box, to, into whichenters the end of the fixed tapering shaft to. This shaft w is sustainedin a box, a, that is attached upon the spider c, and extends into thehollow axle 01 contiguous to the cross-head o and slide to. The shaft 20is fitted into the box a with a screw-thread, which permits its endwiseadjustment, and a set-nut is applied for clamping the shaft in place.This construction permits adjustment of shaft to to compensate for wear,the shaft w, by its taper, spreading the box w. The end of box a holdsthe slide 20 in place, and to allow of adjustment the holes throughwhich the screws a pass to hold the box a are elongated, as shown inFig. 10.

The position of the shaft w is below the cen ter of wheel b on alinedrawn vertically through the said center. The shaft 10 and the axis ofwheel B being fixed, the rotation of the wheel 13 causes the projectionof the pistons 8, their path of rotation being an ellipse. This will bemost clearly seen by reference to Figs. 6, 7, 8, wherein the horizontaldotted line D D passes through the center of wheel B and the center ofslide at", and the line E through the center of shaft to or the centerof the steamway.

In Fig. 6 the pistons are horizontal, projeoted at an equal distance atboth sides of wheel B, and the central point between the two pistons ison the center of the wheel.

In Fig. 7 the wheel has made an eighth of a revolution, and the centerpoint between the two pistons has moved to the right from the center ofwheel A.

In Fig. 8 the wheel has made a quarter-revolution, bringing tlw pistonsvertical, and the center point between them at the center of shaft to.The figure thus described at the outer end of the pistons is that of anellipse, the major diameter of which is on a line drawn horizontallythrough the center of shaft 10.

At the top of case A is fitted the steam-chest and valve-chamber C,containing a slide-valve, q. The valve q is formed with a rack on itsupper surface, which engages a pinion, c, that s fixed on a shaft, f,which extends through case 0, and is fitted with a handle, whereby thevalve may be moved to reverse the movement of the engine. The valve q isof a size to extend over the exhaust-port 0 and either port at m, and isrecessed at the under side. By these means the steam, air, or waterentering the case 0 by pipe g is directed to either port at or m,according to the direction the engine is to be turned.

In operation the steam, air, or water entering by the port at or m actswith full force on the piston as soon as the piston reaches the end ofgroove 12 or n, which is at the same moment that the opposite pistonreaches the opposite groove n or n, and the steam begins to exhaust bysuch groove. The engine may be used as a pump or blower, a separatemotor being used in that case to drive the wheel.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- I. In rotary engines and pumps, the wheel 13,fitted with pistons s, cross-head. v, sliding box to, and hollow axle d,combined with case A, having an elliptical steamway, and the fixed axisto, that enters the box 10 of the crosshead, substantially as shown anddescribed.

2. In combination with the sliding box w, cross-head r, pistons s, andwheel B, the tapering and threaded shaft to and the box a, fixed uponthe frame of the engine and extending through the hollow axle of thewheel, substantially as described and shown.

3. In combination with the rotary wheel B, having the hollow axle d, andfitted with sliding pistons s, cross-head t2, and box 10, the box a,fixed adjustably upon the frame of the engine and projecting through theaxle d to the head '0, substantially as and for the purposes set forth.

SAMUEL BARROW. DAVID BARROW. JAGOB BARROW.

Witnesses:

0. It. OLSEN, H. G. NEWCOMB, Jr.

